linux-kernel - Re: [PATCH v14 12/22] vfio: Add notifier callback to parent's ops structure of mdev

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Date:   Thu, 17 Nov 2016 21:30:26 +0530
From:   Kirti Wankhede <kwankhede@...dia.com>
To:     Alex Williamson <alex.williamson@...hat.com>,
        Jike Song <jike.song@...el.com>
CC:     <pbonzini@...hat.com>, <kraxel@...hat.com>, <cjia@...dia.com>,
        <qemu-devel@...gnu.org>, <kvm@...r.kernel.org>,
        <kevin.tian@...el.com>, <bjsdjshi@...ux.vnet.ibm.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v14 12/22] vfio: Add notifier callback to parent's ops
 structure of mdev



On 11/17/2016 8:57 PM, Alex Williamson wrote:
> On Thu, 17 Nov 2016 20:35:38 +0800
> Jike Song <jike.song@...el.com> wrote:
> 
>> On 11/17/2016 04:46 AM, Kirti Wankhede wrote:
>>> Add a notifier calback to parent's ops structure of mdev device so that per
>>> device notifer for vfio module is registered through vfio_mdev module.
>>>
>>> Signed-off-by: Kirti Wankhede <kwankhede@...dia.com>
>>> Signed-off-by: Neo Jia <cjia@...dia.com>
>>> Change-Id: Iafa6f1721aecdd6e50eb93b153b5621e6d29b637
>>> ---
>>>  drivers/vfio/mdev/vfio_mdev.c | 34 +++++++++++++++++++++++++++++++++-
>>>  include/linux/mdev.h          |  9 +++++++++
>>>  2 files changed, 42 insertions(+), 1 deletion(-)
>>>
>>
>> Hi Alex, Kirti,
>>
>> Since everyone agreed we should let the vendor driver call vfio_register_notifier
>> directly, can you drop this patch from merging? So that I don't need to send a
>> reverse patch.
> 
> This seems like a reasonable request to me, this patch drops cleanly
> from the series.  Any objection Kirti?  It seems like it removes a
> little bit of pre-release churn from the API.  Thanks,
> 

This is independent patch, I don't have any concern to drop this patch.

Small nit: Since Documentation patch is later in series, its mentioned
in the doc. One line need to be removed from vfio-mediated-device.txt.

--- a/Documentation/vfio-mediated-device.txt
+++ b/Documentation/vfio-mediated-device.txt
@@ -150,7 +150,6 @@ The callbacks in the parent_ops structure are as
follows:
 * read : read emulation callback
 * write: write emulation callback
 * mmap: mmap emulation callback
-* notifier: notifier callback

Thanks,
Kirti